diff options
| author | Stefan Binding <sbinding@opensource.cirrus.com> | 2023-10-26 16:05:52 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2023-10-26 17:55:18 +0200 |
| commit | a7423e9019a9a595919da44104725eef8a518652 (patch) | |
| tree | a020b674faeaab25842a22f47c9a21e9cc3fc399 /sound | |
| parent | f01b371b0794f43586d4f0b7dd0d9226c25553e5 (diff) | |
ALSA: hda: cs35l41: Assert reset before system suspend
Some system suspend modes may remove power supplies.
To ensure we are not running during this time, we should assert reset.
Note: since the amps use a shared reset, asserting reset prior to
system suspend only works if the amps are suspended in the reverse
order to probe.
Signed-off-by: Stefan Binding <sbinding@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20231026150558.2105827-3-sbinding@opensource.cirrus.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/pci/hda/cs35l41_hda.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/sound/pci/hda/cs35l41_hda.c b/sound/pci/hda/cs35l41_hda.c index 28cb10ddd191..919e38213975 100644 --- a/sound/pci/hda/cs35l41_hda.c +++ b/sound/pci/hda/cs35l41_hda.c @@ -813,14 +813,17 @@ static int cs35l41_system_suspend(struct device *dev) /* Shutdown DSP before system suspend */ ret = cs35l41_ready_for_reset(cs35l41); - if (ret) dev_err(dev, "System Suspend Failed, not ready for Reset: %d\n", ret); - /* - * Reset GPIO may be shared, so cannot reset here. - * However beyond this point, amps may be powered down. - */ + if (cs35l41->reset_gpio) { + dev_info(cs35l41->dev, "Asserting Reset\n"); + gpiod_set_value_cansleep(cs35l41->reset_gpio, 0); + usleep_range(2000, 2100); + } + + dev_dbg(cs35l41->dev, "System Suspended\n"); + return ret; } |